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Finding the Fourth Proportional to 84,710.72, 127,077.80 and 28,566.90

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Solution

The fourth proportional to 84,710.72, 127,077.80 and 28,566.90 is: 42,854.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,710.72 : 127,077.80 = 28,566.90 : x
  2. Step 2: Convert to fraction form
    84,710.72/127,077.80 = 28,566.90/x
  3. Step 3: Cross multiply
    84,710.72x = 127,077.80 × 28,566.90
  4. Step 4: Simplify right side
    84,710.72x = 3,630,218,804.82
  5. Step 5: Solve for x
    x = 3,630,218,804.82/84,710.72
  6. Step 6: Final answer
    x = 42,854.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.